https://www.apple.com/in/shop/product/MMX62ZM/A/lightning-to-35mm-headphone-jack-adapter THis should work, I reckon. Your headphone has a 3.5mm slot, right?

Lonely detailed review thanks. I have been interested in this. As I don’t have a planar. But holding on until reviews of timeless 2 come out. Just need one of em. Hope you will be doing a review of it, and compare with this, when you get your hands on it. Will wait. Enjoyed this review.

Looks like they giving the hefty discount without any newsletter/waiting period. Now.

https://penonaudio.com/penon-fan-2.html